CAT 173-9779 M24 x 3 x 80 mm Hex Head Bolt

Product Overview

The CAT 173-9779 Hex Head Bolt is a genuine Caterpillar high-strength fastener engineered to provide secure, reliable clamping in demanding heavy equipment applications. Manufactured to Caterpillar’s exact specifications, this M24 x 3 x 80 mm bolt is designed to deliver the required clamp load, durability, and long-term performance for construction, mining, forestry, and industrial machinery.

Featuring a six-sided hexagonal head for easy installation with standard wrenches or sockets, the 173-9779 bolt is manufactured from high-strength alloy steel and finished with a zinc phosphate and oil coating to provide corrosion resistance during service. As a genuine Cat fastener, it is designed to work in conjunction with matching Caterpillar nuts and hardened washers to achieve maximum joint integrity and reliability.

Key Features

• Genuine Caterpillar OEM hex head bolt
• Thread size: M24 x 3
• Overall bolt length: 80 mm (3.15 in)
• High-strength ISO 898-1 Class 11.9 alloy steel construction
• Zinc phosphate and oil protective coating
• Right-hand thread
• Precision-manufactured for correct clamp load and fit
• Designed for heavy-duty construction and mining equipment
• Compatible with matching Cat hardened washers and M24 nuts
• Meets Caterpillar quality and durability standards

Technical Specifications

Compatible Caterpillar Equipment

The CAT 173-9779 bolt is used across numerous Caterpillar machines, including selected models of:

Wheel Loaders

• 924
• 924G
• 924H
• 924K
• 930
• 930G
• 930H
• 938
• 938H
• 950 Series
• 962 Series
• 980 Series
• 982 Series
• 990 Series
• 992 Series
• 993K

Track-Type Tractors

• D4
• D5
• D5R2
• D6K
• D6K2
• D6N
• D6R
• D6T
• D7 Series
• D8 Series
• D9 Series
• D10 Series
• D11 Series

Wheel Tractor-Scrapers

• 631
• 631K
• 637
• 637K
• 657

Integrated Tool Carriers

• IT12B
• IT14G
• IT14G2
• IT38F
• IT38G
• IT38H
• IT62G
• IT62H

Off-Highway Trucks

• 789
• 789D
• 789G
• 793D
• 793F

Additional Applications

• AD63 Underground Articulated Truck
• MH3250, MH3260, MH3295 Material Handlers
• Selected forestry machines
• Various OEM and specialty Caterpillar equipment

Compatibility varies by machine serial number and configuration. Always verify the part number using the machine Serial Number (PIN) or equipment parts manual before ordering.

Related Genuine Cat Hardware

The 173-9779 bolt is commonly used with the following Caterpillar hardware:

• 6V-7676 M24 x 3 Hex Lock Nut
• 7X-0851 M24 x 3 Hex Nut
• 317-1117 M24 x 3 Cone Lock Nut
• 6V-8237 M24 Hardened Flat Washer
• 198-4771 M24 Flat Washer

Benefits

Using a genuine CAT 173-9779 Hex Head Bolt helps:

• Maintain correct clamping force in critical assemblies
• Improve equipment reliability and structural integrity
• Reduce the risk of fastener loosening under heavy loads
• Ensure proper fit with genuine Caterpillar hardware
• Extend service life in harsh operating environments
• Minimize maintenance downtime through OEM-quality performance